release: v9.0.0 and update release notes (appium#2041)

Release 8.6.0 and update release notes (appium#2033)

Release 8.5.1 and update release notes

Release 8.5.0 and update release notes

Release 8.4.0 and update release notes

Release 8.3.0 and update release notes

docs: update release notes

Release 8.2.0 and update release notes

Release 8.1.1 and update release notes